Optical transponder

Abstract

An optical repeater device includes an amplifier module and a monitoring control circuit. The optical amplifier module includes an amplifier optical circuit including a plurality of amplification cores that amplify signal light propagating through different cores, and an optical amplifier control circuit that receives detection results from optical detectors at a plurality of signal light waveguide points of the amplifier optical circuit and generates a control signal directed to an excitation light source. The monitoring control circuit includes a reception unit that receives monitoring control channel light, a transmission unit that transmits the monitoring control channel light, an information determination unit that determines whether the monitoring control information received from the reception unit is for its own device or for another device, and a monitoring control unit that receives monitoring control information from the other device via the reception unit and the information determination unit and transmits the monitoring control information of its own device to the other device via the transmission unit and the information determination unit.

The invention claimed is: 
     
       1. An optical repeater device comprising:
 an optical amplifier module including an amplifier optical circuit, the amplifier optical circuit including a plurality of amplification cores configured to amplify signal light propagating through different cores, and an optical amplifier control circuit configured to receive detection results from the amplifier optical circuit and generate a control signal directed to an excitation light source; and 
 a monitoring control circuit including a reception unit configured to receive monitoring control channel light, a transmission unit configured to transmit the monitoring control channel light, an information determination unit configured to determine whether monitoring control information transmitted by the monitoring control channel light received from the reception unit is for the optical repeater device or for another device, and a monitoring control unit configured to receive the monitoring control information from the another device via the reception unit and the information determination unit and transmit the monitoring control information of the optical repeater device to the another device via the transmission unit and the information determination unit, 
 wherein the monitoring control circuit collectively processes the monitoring control channel light for the respective different amplification cores. 
 
     
     
       2. The optical repeater device according to  claim 1 , further comprising:
 a multiplexer and demultiplexer to which a transmission fiber having a plurality of cores is connected, the multiplexer and demultiplexer demultiplexing the monitoring control channel light from main signal channel light for each core of the plurality of cores and outputting the monitoring control channel light to the reception unit via the transmission fiber having the plurality of cores. 
 
     
     
       3. The optical repeater device according to  claim 1 , further comprising:
 a multiplexer and demultiplexer to which a transmission fiber having a plurality of cores is connected, the multiplexer and demultiplexer demultiplexing the monitoring control channel light from main signal channel light of one of the plurality of cores and outputting the monitoring control channel light to the reception unit via a single core fiber. 
 
     
     
       4. The optical repeater device according to  claim 1 , further comprising:
 a multiplexer and demultiplexer to which a transmission fiber having a plurality of single core fibers is connected, the multiplexer and demultiplexer demultiplexing the monitoring control channel light from main signal channel light for each of the single core fibers and outputting the monitoring control channel light to the reception unit via the plurality of single core fibers.